<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body" v-for="good in cartInfoList" :key="good.skuId">
        <ul class="cart-list">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" id="" value="" @click="changeChecked(good)" :checked="good.isChecked == 1" />
          </li>
          <li class="cart-list-con2">
            <img :src="imgUrl" />
            <div class="item-msg">{{ good.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ good.skuPrice }}.00</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="subAndAdd('sub', good)">-</a>
            <input
              autocomplete="off"
              type="text"
              :value="good.skuNum"
              minnum="1"
              class="itxt"
              @change="changeSkuNum(good, $event)"
            />
            <a href="javascript:void(0)" class="plus" @click="subAndAdd('add', good)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ good.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a class="sindelet" @click="deleteCart(good.skuId)">删除</a>
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :disabled="cartInfoList.length == 0 ? true : false"
          :checked="isCheckAll && cartInfoList.length > 0"
          @click="checkAll"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="" @click.prevent="delSelectAll">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>0</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ goodsTotal }}</i>
        </div>
        <div class="sumbtn">
          <router-link to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapGetters } from 'vuex'
// 按需导入节流函数
import throttle from '/node_modules/lodash/throttle.js'
export default {
  data() {
    return {
      imgUrl: sessionStorage.getItem('imgUrl')
    }
  },
  name: 'ShopCart',
  mounted() {
    this.getData()
  },
  computed: {
    ...mapGetters(['cartList']),
    cartInfoList() {
      return this.cartList.cartInfoList || []
    },
    goodsTotal() {
      return this.cartInfoList
        .filter((item) => item.isChecked == 1)
        .reduce((total, item) => (total += item.skuNum * item.skuPrice), 0)
    },
    isCheckAll() {
      return this.cartInfoList.every((item) => item.isChecked === 1)
    }
  },
  methods: {
    getData() {
      this.$store.dispatch('getCartList')
    },
    deleteCart(id) {
      try {
        this.$store.dispatch('deleteGood', id)
        this.getData()
      } catch (error) {
        alert(error.message)
      }
    },
    subAndAdd: throttle(function (type, cart) {
      if (type == 'sub' && cart.skuNum > 1) {
        let params = { skuId: cart.skuId, skuNum: -1 }
        this.$store.dispatch('addOrUpdataShopCart', params)
        this.getData()
      } else {
        let params = { skuId: cart.skuId, skuNum: +1 }
        this.$store.dispatch('addOrUpdataShopCart', params)
        this.getData()
      }
    }, 2000),
    async changeSkuNum(cart, e) {
      let params = { skuId: cart.skuId }
      let value = e.target.value * 1
      // 判断用户是否输入非法
      if (isNaN(value) || value < 1) {
        params.skuNum = 0
      } else {
        params.skuNum = parseInt(value) - cart.skuNum
      }
      try {
        await this.$store.dispatch('addOrUpdataShopCart', params)
        this.getData()
      } catch (error) {}
    },
    // 切换商品状态
    async changeChecked(cart) {
      let params = { skuID: cart.skuId }
      if (cart.isChecked === 1) {
        params.isChecked = 0
      } else {
        params.isChecked = 1
      }
      try {
        await this.$store.dispatch('changeCartChecked', params)
      } catch (error) {}
    },
    // 全选按钮
    checkAll(e) {
      let isChecked = e.target.checked ? '1' : '0'
      this.$store.dispatch('updateCheckAll', isChecked)
    },
    // 删除全部选中的商品
    delSelectAll() {
      this.cartInfoList.forEach((item) => {
        if (item.isChecked == '1') this.$store.dispatch('deleteGood', item.skuId)
        this.getData()
      })
    }
  }
}
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 10%;
        }

        .cart-list-con5 {
          width: 17%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            cursor: pointer;
            color: #666;
          }
          a:hover {
            border-bottom: 1px solid #000;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: 'Microsoft YaHei';
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
